Fig. 13
From: Imaging findings of the orbital and intracranial complications of acute bacterial rhinosinusitis
Brain abscess: a) Sagittal ceCT image showing an intra-axial fluid collection in the frontal lobe with rim enhancement (short arrow) and surrounding oedema. In addition, a subdural collection with thickening and enhancement of the meninges is present (long arrow). b) Axial T1w ceMRI, c) DWI b1000, and d) ADC map in the same patient showing a fluid collection in the frontal sinus with mucosal enhancement and restricted diffusion (long white arrow), a subdural fluid collection with thickened, enhancing meninges, and restricted diffusion (black arrow), and a fluid collection with rim enhancement in the left frontal lobe with restricted diffusion (short white arrow) and surrounding oedema. The findings are indicative of frontal sinusitis with pus formation, subdural empyema and brain abscess